Battery pack having PCM case

ABSTRACT

Disclosed herein is a battery pack configured to have a structure in which a protection circuit module (PCM) is mounted at a sealed surplus part of a battery cell at which electrode terminals of the battery cell are located, wherein the PCM includes a protection circuit board (PCB), a safety element, and an electrically insulative module case for surrounding the PCB and the safety element, the module case includes an upper case and a lower case coupled to each other through an assembly type fastening structure for receiving the PCB and the safety element, the module case, the PCB, and the electrode terminals are provided with first openings and second openings having a sufficient size to allow a first joint fastening member and a second joint fastening member to extend therethrough, and the PCB is received between the upper case and the lower case such that the PCB is electrically connected to the electrode terminals of the battery cell in a state in which the PCB is coupled to the electrode terminals of the battery cell by the first joint fastening member and the second joint fastening member.

TECHNICAL FIELD

The present invention relates to a battery pack including a protectioncircuit module (PCM) case and, more particularly, to a battery packconfigured to have a structure including a plate-shaped battery cellincluding a sealed surplus part and a protection circuit module (PCM)mounted at the sealed surplus part, wherein the PCM includes aprotection circuit board (PCB), a safety element, and an electricallyinsulative module case, the module case includes an upper case and alower case coupled to each other through an assembly type fasteningstructure for receiving the PCB and the safety element, the module case,the PCB, and the electrode terminals are provided with first openingsand second openings having a sufficient size to allow a first jointfastening member and a second joint fastening member to extendtherethrough, and the PCB is loaded on the sealed surplus part of thebattery cell in a state in which the PCB is received between the uppercase and the lower case such that the PCB is electrically connected tothe electrode terminals of the battery cell in a state in which the PCBis coupled to the electrode terminals of the battery cell by the firstjoint fastening member and the second joint fastening member.

BACKGROUND ART

A secondary battery represented by a lithium secondary batteryexhibiting high energy density and operating voltage and excellentcharge retention and service-life characteristics has been widely usedas an energy source for various electronic products as well as variousmobile devices.

Depending upon the kind of an external device in which a secondarybattery is used, the secondary battery may be configured to have adetachable type structure in which the secondary battery can be easilyinserted into and removed from the external device or to have anembedded type structure in which the secondary battery is embedded inthe external device. For example, the secondary battery can be insertedor removed into or from devices, such as laptop computers, as needed. Onthe other hand, devices, such as some kinds of smart phones and smartpads, require an embedded type battery pack due to the structure orcapacity thereof.

Meanwhile, various kinds of combustible materials are contained in thelithium secondary battery. As a result, the lithium secondary batterymay be heated or explode due to the overcharge of the lithium secondarybattery, the overcurrent in the lithium secondary battery, or otherexternal physical impact applied to the lithium secondary battery. Thatis, the safety of the lithium secondary battery is very low. For thisreason, safety elements, such as a positive temperature coefficient(PTC) element and a protection circuit module (PCM), which are capableof effectively controlling an abnormal state of the lithium secondarybattery, such as the overcharge of the lithium secondary battery or theovercurrent in the lithium secondary battery, are connected to a batterycell of the lithium secondary battery.

In general, an embedded type secondary battery pack uses a plate-shapedbattery cell, which is suitable for electrical connection, and a PCM isconnected to the battery cell via conductive nickel plates by welding orsoldering. That is, the nickel plates are connected to electrodeterminals of the battery cell by welding or soldering, a flexibleprinted circuit board (F-PCB) is attached to one side of a double-sidedadhesive tape, a protective tape is attached to the other side of thedouble-sided adhesive tape, and electrode tabs of the F-PCB and thenickel plates are connected to each other by welding in a state in whichthe F-PCB is in tight contact with the battery cell. In this way, thePCM is connected to the battery cell to manufacture a battery pack.

It is required for the safety elements, including the PCM, to bemaintained in electrical connection with the electrode terminals of thebattery cell and, at the same time, to be electrically isolated fromother parts of the battery cell.

To this end, insulative tapes are attached to various members, includingthe PCM. In addition, a portion of a sealed part of a battery case, inwhich the battery cell is received, is bent, and an insulative tape isattached thereto or a barcode is printed thereon. That is, the processis very complicated.

Since a plurality of insulative tapes or parts is required to achievesafe connection as described above, a battery pack assembly process iscomplicated and manufacturing cost of the battery pack is increased.

In addition, when external impact is applied to the battery pack, thePCM may be damaged or dimensional stability of the battery pack may begreatly lowered due to the use of the insulative tapes, which exhibitlow mechanical strength.

Therefore, there is a high necessity for a technology that is capable ofreducing the number of members mounted to the battery cell to simplifyan assembly process, achieving stable coupling between members loaded onthe battery cell, and protecting the PCM.

DISCLOSURE Technical Problem

Therefore, the present invention has been made to solve the aboveproblems, and other technical problems that have yet to be resolved.

Specifically, it is an object of the present invention to provide abattery pack wherein the number of parts necessary to manufacture thebattery pack is reduced, thereby simplifying an assembly process, andstructural stability of the battery pack is improved.

It is another object of the present invention to provide a battery packincluding a module case having a specific structure configured toprovide higher electric capacity than other different battery packshaving the same standard while having a compact structure.

Technical Solution

In accordance with one aspect of the present invention, the above andother objects can be accomplished by the provision of a battery packconfigured to have a structure including a plate-shaped battery cell,which has an electrode assembly, configured to have a structure in whicha separator is disposed between a cathode and an anode, received in abattery case together with an electrolyte in a sealed state andelectrode terminals formed at one side thereof including a sealedsurplus part, and a protection circuit module (PCM) mounted at thesealed surplus part, wherein each of the electrode terminals of thebattery cell is made of a plate-shaped conductive member, the PCMincludes a protection circuit board (PCB), a safety element electricallyconnected between the electrode terminals formed at one side of thebattery cell and the PCB or loaded on the PCB, and an electricallyinsulative module case for surrounding the PCB and the safety element,the module case includes an upper case and a lower case coupled to eachother through an assembly type fastening structure for receiving the PCBand the safety element, the module case, the PCB, and the electrodeterminals are provided with first openings and second openings having asufficient size to allow a first joint fastening member and a secondjoint fastening member to extend therethrough, and the PCB is loaded onthe sealed surplus part of the battery cell in a state in which the PCBis received between the upper case and the lower case such that the PCBis electrically connected to the electrode terminals of the battery cellin a state in which the PCB is coupled to the electrode terminals of thebattery cell by the first joint fastening member and the second jointfastening member.

In the battery pack according to the present invention, the protectioncircuit module case including the upper case, the lower case, the firstopenings, and the second openings is applied to the battery pack.Consequently, it is possible to reduce the number of parts constitutingthe battery pack and to simplify the coupling structure of the batterypack, thereby improving manufacturing processability and stability ofthe battery pack.

In addition, in the battery pack according to the present invention, themodule case having the specific structure as described above is appliedto the battery pack. Consequently, it is possible to provide higherelectric capacity than other different battery packs having the samestandard while having a compact structure.

In a concrete example, the plate-shaped battery cell may be provided atone side or opposite sides of the sealed surplus part thereof with anopening, through which the electrode terminals are exposed. Theoutermost ends of the electrode terminals may have a size correspondingto an outer circumference of the sealed surplus part. In addition, theopening may be formed by cutting the sealed surplus part.

In another concrete example, the plate-shaped battery cell may beconfigured to have a structure in which the electrode terminals extendoutward from one side thereof including the sealed surplus part.

For example, the plate-shaped battery cell may be a pouch-shapedsecondary battery.

Specifically, the pouch-shaped secondary battery may be configured tohave a structure in which an electrode assembly is received in a batterycase made of a laminate sheet including a resin layer and a metal layerin a sealed state. The electrode assembly may be configured to have astructure including a cathode, an anode, and a separator disposedbetween the cathode and the anode. The electrode assembly may bereceived in the battery case together with an electrolyte in a sealedstate.

The secondary battery may be a lithium secondary battery exhibiting highenergy density, discharge voltage, and output stability. Othercomponents of the lithium secondary battery will hereinafter bedescribed in detail.

In general, the lithium secondary battery includes a cathode, an anode,a separator, and a non-aqueous electrolytic solution containing lithiumsalt.

The cathode may be manufactured, for example, by applying a mixture of acathode active material, a conductive material, and a binder to acathode current collector and drying the applied mixture. A filler maybe further added as needed. On the other hand, the anode may bemanufactured by applying an anode material to an anode current collectorand drying the applied anode material. The above-mentioned ingredientsmay be further included as needed.

The separator is disposed between the anode and the cathode. Theseparator may be made of an insulative thin film exhibiting high ionpermeability and mechanical strength.

The non-aqueous electrolytic solution containing lithium salt consistsof a non-aqueous electrolyte and lithium salt. A liquid non-aqueouselectrolytic solution, a solid electrolyte, or an inorganic solidelectrolyte may be used as the non-aqueous electrolyte.

The current collectors, the electrode active materials, the conductivematerial, the binder, the filler, the separator, the electrolyticsolution, and the lithium salt are well known in the art to which thepresent invention pertains and, therefore, a detailed descriptionthereof will be omitted.

The lithium secondary battery may be manufactured using an ordinarymethod well known in the art to which the present invention pertains.For example, the lithium secondary battery may be manufactured bydisposing a porous separator between a cathode and an anode andinjecting an electrolytic solution thereinto.

The cathode may be manufactured, for example, by applying a slurrycontaining a lithium transition metal oxide active material, aconductive material, and a binder to a current collector and drying theapplied slurry. In the same manner, the anode may be manufactured, forexample, by applying a slurry containing a carbon active material, aconductive material, and a binder to a thin current collector and dryingthe applied slurry.

In the present invention, the sealed surplus part means an upper endsealed part formed when the battery case is thermally bonded in a sealedstate.

Specifically, a sealed part having a surplus space formed at one of thesealed outer circumferences of the battery case formed when theelectrode assembly is disposed in the battery case made of the laminatesheet in a sealed state is referred to as a sealed surplus part.However, the sealed surplus part may be replaced by terms, such as athermally bonded surplus part and a sealed terrace, as long as thespecified terms have the same meaning as the sealed surplus part.

In a concrete example, the safety element may be an element that iscapable of effectively controlling an abnormal state of the anode andcathode terminals electrically connected to a device in which thebattery pack is mounted and an abnormal state of the battery pack, suchas the overcharge of the battery pack or the overcurrent in the batterypack. Examples of the safety element may include a positive temperaturecoefficient (PTC) element, a fuse, and a thermal cutoff or cutout (TCO).

In another concrete example, the assembly type fastening structure mayinclude two or more fastening protrusions formed at one side of thelower case and two or more fastening grooves formed at the upper case ina state in which each of the fastening grooves has a structurecorresponding to a structure of a corresponding one of the fasteningprotrusions.

In addition, the first joint fastening member may extend through thefirst openings, the second joint fastening member may extend through thesecond openings, and the first openings and the second openings formedat the module case, the PCB, and the electrode terminals each may bealigned in a straight line such that the first joint fastening memberand the second joint fastening member extend through the first openingsand the second openings formed at the module case, the PCB, and theelectrode terminals, respectively, in the straight line.

The first joint fastening member and the second joint fastening membereach may be made of an electrically conductive material. In this case,bolt heads of the first joint fastening member and the second jointfastening member may function as external input and output terminalsafter the first joint fastening member and the second joint fasteningmember are fixed to the module case, the PCB, and the electrodeterminals by bolting.

In addition, the first joint fastening member and the second jointfastening member each may be configured to have a bolt structureincluding a bolt head and a bolt body having a thread formed at anoutside thereof for fixing the module case, the PCB, and the electrodeterminals by bolting. Consequently, the first joint fastening member andthe second joint fastening member with the above-stated construction mayfix even a mount part of a device, in which the battery pack is mounted,by bolting, thereby achieving a stable mounting effect of the batterypack.

The module case with the above-stated construction includes the uppercase and the lower case each configured to have a specific structure.Consequently, it is possible to easily receive and fix the PCB and thesafety element in the module case. In addition, the module case isconfigured to have a structure which does not require an additionalfixing member or protection member. Consequently, productivity isimproved through a simplified assembly process. Furthermore, the PCB andthe safety element are securely and stably fixed by the first jointfastening member and the second joint fastening member in a state inwhich the PCB and the safety element are received in the module casesuch that the PCB and the safety element can be protected from theoutside. Consequently, it is possible to improve overall mechanicalstrength of the PCM.

In addition, the module case, in which the PCB and the safety elementare received, may be a rectangular hexahedral structure having a smoothouter surface. Consequently, the module case may be easily loaded on thesealed surplus part of the battery cell.

As a result, the battery pack according to the embodiment of the presentinvention has a more compact structure than a conventional battery pack.In addition, it is possible to utilize a space occupied by a PCM, a PCMfixing member, or PCM protection members of the conventional batterypack as a space for electrical capacity. Consequently, it is possible toincrease electrical capacity of the battery pack.

In a concrete example, the battery pack may further include a labelattached to outer surfaces of the PCM and the battery cell excluding theexternal input and output terminals in a wrapping fashion. Consequently,it is possible to more stably secure electrical connection between theelectrode terminals of the battery cell and the PCB while maintaininginsulation of the battery cell.

In accordance with another aspect of the present invention, there isprovided a protection circuit module (PCM), having a specific structure,which is used to constitute the battery pack with the above-statedconstruction.

Specifically, there is provided a PCM loaded on a sealed surplus part ofa plate-shaped battery cell having an electrode assembly, configured tohave a structure in which a separator is disposed between a cathode andan anode, received in a battery case together with an electrolyte in asealed state, wherein the PCM includes a PCB, a safety elementelectrically connected between electrode terminals formed at one side ofthe battery cell and the PCB or loaded on the PCB, and an electricallyinsulative module case for surrounding the PCB and the safety element,the module case includes an upper case and a lower case coupled to eachother through an assembly type fastening structure for receiving the PCBand the safety element, the module case, the PCB, and the electrodeterminals are provided with first openings and second openings having asufficient size to allow a first joint fastening member and a secondjoint fastening member to extend therethrough, and the PCB is loaded onthe sealed surplus part of the battery cell in a state in which the PCBis received between the upper case and the lower case such that the PCBis electrically connected to the electrode terminals of the battery cellin a state in which the PCB is coupled to the electrode terminals of thebattery cell by the first joint fastening member and the second jointfastening member.

In a general process of assembling an embedded type battery pack, aconnection member and an F-PCB are coupled and an insulative tape isattached at each step such that a PCM assembly is mounted on a batterycell. Consequently, the PCM assembly is mounted to the battery cellusing a large number of parts. As a result, a large number of processesare required. In addition, mechanical strength and structural stabilityof the battery pack are low.

On the other hand, the PCM according to the present invention isconfigured to have a structure in which the safety element is mounted inthe module case in a state in which the safety element is coupled to thePCB. Consequently, structural stability of the battery pack is improvedand a process of manufacturing the battery pack is greatly simplified.

In a concrete example, the first joint fastening member may extendthrough the first openings, the second joint fastening member may extendthrough the second openings, and the first openings and the secondopenings formed at the module case, the PCB, and the electrode terminalseach may be aligned in a straight line such that the first jointfastening member and the second joint fastening member extend throughthe first openings and the second openings formed at the module case,the PCB, and the electrode terminals, respectively, in the straightline.

The first joint fastening member and the second joint fastening membereach may be made of an electrically conductive material. In this case,bolt heads of the first joint fastening member and the second jointfastening member may function as external input and output terminalsafter the first joint fastening member and the second joint fasteningmember are fixed to the module case, the PCB, and the electrodeterminals by bolting.

In addition, the first joint fastening member and the second jointfastening member each may be configured to have a bolt structureincluding a bolt head and a bolt body having a thread formed at anoutside thereof for fixing the module case, the PCB, and the electrodeterminals by bolting. Consequently, the first joint fastening member andthe second joint fastening member with the above-stated construction mayfix even a mount part of a device, in which the battery pack is mounted,by bolting, thereby achieving a stable mounting effect of the batterypack.

In accordance with another aspect of the present invention, there isprovided a method of manufacturing the battery pack with theabove-stated construction.

Specifically, the method of manufacturing the battery pack according tothe present invention may include (a) mounting a PCB in a module case,(b) loading a PCM on a sealed surplus part of a battery cell, (c)assembling and fastening a first joint fastening member and a secondjoint fastening member into first openings and second openings,respectively, and (d) attaching a label to outer surfaces of the PCM andthe battery cell in a wrapping fashion.

As compared with a method of manufacturing a conventional embedded typebattery pack, it is possible for the battery pack manufacturing methodaccording to the present invention to reduce the number of manufacturingprocesses and to provide a battery pack exhibiting improved structuralstability.

In accordance with a further aspect of the present invention, there isprovided a mobile device including the battery pack with theabove-stated construction as a power source.

Concrete examples of the mobile device in which the battery packaccording to the present invention can be used may include a mobilephone, a laptop computer, a netbook computer, a tablet PC, and a smartpad.

The above-described devices or apparatuses are well known in the art towhich the present invention pertains and, therefore, a detaileddescription will be omitted.

BRIEF DESCRIPTION OF DRAWINGS

The above and other objects, features and other advantages of thepresent invention will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a perspective view showing a battery pack according to anembodiment of the present invention;

FIG. 2 is an exploded perspective view of the battery pack shown in FIG.1; and

FIGS. 3 to 6 are typical views showing a process of manufacturing abattery pack according to an embodiment of the present invention.

BEST MODE

Now, exemplary embodiments of the present invention will be described indetail with reference to the accompanying drawings. It should be noted,however, that the scope of the present invention is not limited by theillustrated embodiments.

FIG. 1 is a perspective view showing a battery pack according to anembodiment of the present invention and FIG. 2 is an explodedperspective view of the battery pack shown in FIG. 1.

Referring to these drawings, a battery pack 600 includes a plate-shapedbattery cell 100 having electrode terminals 110 and 120 formed at oneside thereof including a sealed surplus part 130, an electricallyinsulative module case 300 for receiving and fixing a protection circuitboard (PCB) 200, and a first joint fastening member 410 and a secondjoint fastening member 420 for fixing the module case 300 to the sealedsurplus part 130 of the battery cell 100. The plate-shaped battery cell100 and the module case 300 are wrapped by a protection label 500.

Specifically, the module case 300 includes an upper case 310 and a lowercase 320. The module case 300 is configured to have a structure in whichthe PCB 200 is received in an inner space defined between the upper case310 and the lower case 320 as the upper case 310 and the lower case 320are coupled to each other.

The battery cell 100 is provided at one side of the sealed surplus part130 thereof with an opening, through which the electrode terminals 110and 120 are exposed. The outermost ends of the electrode terminals 110and 120 have a size corresponding to the outer circumference of thesealed surplus part 130.

However, the shape of the electrode terminals 110 and 120 of the batterycell 100 is not limited to the shape shown in FIG. 2. For example, thebattery cell 100 may be a plate-shaped battery cell having electrodeterminals extending outward from one side thereof including a sealedsurplus part 130.

FIGS. 3 to 6 are typical views showing a process of manufacturing abattery pack according to an embodiment of the present invention.

Referring first to FIG. 3, a PCB 200 is received in an inner spacedefined between an upper case 310 and a lower case 320 as the upper case310 and the lower case 320 are coupled to each other.

The PCB 200 has a first joint part 210 and a second joint part 220formed on a circuit board. The first joint part 210 is provided with afirst opening 211 and the second joint part 220 is provided with asecond opening 212. In addition, the upper case 310 is provided withfirst openings 311 and 321 and the lower case 320 is provided withsecond openings 312 and 322.

Specifically, the first openings 311, 211, and 321 are aligned in astraight line and the second openings 312, 212, and 322 are aligned in astraight line (see dotted-line arrows).

In addition, the module case 300 is assembled through an assembly typefastening structure in which the upper case 310 and the lower case 320are coupled to each other. The assembly type fastening structureincludes fastening protrusions 323 formed at one side of the lower case320 and fastening grooves 313 formed at the upper case 310 such that thefastening grooves 313 correspond to the fastening protrusions 323.

Referring to FIG. 4, the module case 300, in which the PCB 200 isreceived, is loaded on a sealed surplus part 130 of a battery cell 100.

Electrode terminals 110 and 120 formed at the sealed surplus part 130 ofthe battery cell 100 are provided with a first opening 111 and a secondopening 121, respectively. The first opening 111 is aligned with thefirst opening 311 formed at the module case 300 and the second opening121 is aligned with the second openings 312 formed at the module case300 (see dotted lines).

Referring to FIG. 5, a first joint fastening member 410 and a secondjoint fastening member 420 are fastened through the first opening 311and the second openings 312 by bolting.

The first joint fastening member 410 and the second joint fasteningmember 420 each are made of an electrically conductive material. Thefirst joint fastening member 410 includes a bolt head 411 and a boltbody 412 having a thread formed at the outside thereof. In the samemanner, the second joint fastening member 420 includes a bolt head 421and a bolt body 422 having a thread formed at the outside thereof. Thefirst joint fastening member 410 and the second joint fastening member420 with the above-stated construction securely fix the module case 300,in which the PCB 200 is received, to the sealed surplus part 130 of thebattery cell 100 and, at the same time, electrically connect theelectrode terminals 110 and 120 of the battery cell 100 to the firstjoint part 210 and the second joint part 220 of the PCB 200,respectively.

According to circumstances, the bolt bodies 412 and 422 of the firstjoint fastening member 410 and the second joint fastening member 420 maybe lengthened to fix even a mount part of a device (not shown), in whichthe battery pack 600 is mounted, by bolting.

Meanwhile, the height of the module case 300 loaded on the sealedsurplus part 130 of the battery cell 100 may be substantially equal tothe thickness of the battery cell 100.

The module case 300 with the above-stated construction is a rectangularhexahedral structure having a smooth outer surface. Consequently, themodule case 300 may be easily loaded on the sealed surplus part 130 ofthe battery cell 100. In addition, the module case 300 forms a smoothouter surface of the battery pack 600. Consequently, it is possible tomanufacture a battery pack which has correct dimensions and, at the sametime, provides an aesthetically pleasing appearance.

Referring to FIG. 6, the outer surface of the battery cell 100 and theouter surface of the module case 300 are wrapped by a protection label500 excluding the bolt heads 411 and 421 of the first joint fasteningmember 410 and the second joint fastening member 420.

The label 500, which indicates information of a product, more stablysecures electrical connection between the electrode terminals 110 and120 of the battery cell 110 and the PCB 200 while maintaining aninsulation state of the battery cell 110.

In addition, tops of the bolt heads 411 and 421 of the first jointfastening member 410 and the second joint fastening member 420 fixed inthe first opening 311 and the second openings 312 by bolting are exposedto the outside. The exposed bolt heads 411 and 421 function as externalinput and output terminals for electrically connecting the battery pack600 to an external device (not shown).

Although the exemplary embodiments of the present invention have beendisclosed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

INDUSTRIAL APPLICABILITY

As is apparent from the above description, a battery pack according tothe present invention is configured to have a structure in which aprotection circuit module case including an upper case, a lower case,first openings, and second openings is applied to the battery pack.Consequently, it is possible to simplify a manufacturing process, toimprove structural stability, to provide a battery pack having a compactstructure, and to provide higher electric capacity than other differentbattery packs having the same standard.

The invention claimed is:
 1. A battery pack configured to have astructure comprising a plate-shaped battery cell, which has an electrodeassembly, configured to have a structure in which a separator isdisposed between a cathode and an anode, received in a battery casetogether with an electrolyte in a sealed state and electrode terminalsformed at one side thereof comprising a sealed surplus part, and aprotection circuit module (PCM) mounted at the sealed surplus part,wherein each of the electrode terminals of the battery cell is made of aplate-shaped conductive member, the PCM comprises a protection circuitboard (PCB), a safety element electrically connected between theelectrode terminals formed at one side of the battery cell and the PCBor loaded on the PCB, and an electrically insulative module case forsurrounding the PCB and the safety element, the module case comprises anupper case and a lower case coupled to each other through an assemblytype fastening structure for receiving the PCB and the safety element,the module case, the PCB, and the electrode terminals are provided withfirst openings and second openings having a sufficient size to allow afirst joint fastening member and a second joint fastening member toextend therethrough, and the PCB is loaded on the sealed surplus part ofthe battery cell in a state in which the PCB is received between theupper case and the lower case such that the PCB is electricallyconnected to the electrode terminals of the battery cell in a state inwhich the PCB is coupled to the electrode terminals of the battery cellby the first joint fastening member and the second joint fasteningmember.
 2. The battery pack according to claim 1, wherein the sealedsurplus part is an upper end sealed part formed when the battery case isthermally bonded in a sealed state.
 3. The battery pack according toclaim 1, wherein the plate-shaped battery cell is provided at one sideor opposite sides of the sealed surplus part thereof with an opening,through which the electrode terminals are exposed.
 4. The battery packaccording to claim 3, wherein outermost ends of the electrode terminalshave a size corresponding to an outer circumference of the sealedsurplus part.
 5. The battery pack according to claim 3, wherein theopening is formed by cutting the sealed surplus part.
 6. The batterypack according to claim 1, wherein the plate-shaped battery cell isconfigured to have a structure in which the electrode terminals extendoutward from one side thereof comprising the sealed surplus part.
 7. Thebattery pack according to claim 1, wherein the plate-shaped battery cellis a pouch-shaped secondary battery having an electrode assemblyreceived in a battery case made of a laminate sheet comprising a resinlayer and a metal layer in a sealed state.
 8. The battery pack accordingto claim 1, wherein the safety element comprises at least one selectedfrom a group consisting of a positive temperature coefficient (PTC)element, a fuse, and a thermal cutoff or cutout (TCO).
 9. The batterypack according to claim 1, wherein the assembly type fastening structurecomprises two or more fastening protrusions formed at one side of thelower case and two or more fastening grooves formed at the upper case ina state in which each of the fastening grooves has a structurecorresponding to a structure of a corresponding one of the fasteningprotrusions.
 10. The battery pack according to claim 1, wherein thefirst joint fastening member extends through the first openings, thesecond joint fastening member extends through the second openings, andthe first openings and the second openings formed at the module case,the PCB, and the electrode terminals each are aligned in a straight linesuch that the first joint fastening member and the second jointfastening member extend through the first openings and the secondopenings formed at the module case, the PCB, and the electrodeterminals, respectively, in the straight line.
 11. The battery packaccording to claim 1, wherein the first joint fastening member and thesecond joint fastening member each are made of an electricallyconductive material.
 12. The battery pack according to claim 11, whereinthe first joint fastening member and the second joint fastening membereach are configured to have a bolt structure comprising a bolt head anda bolt body having a thread formed at an outside thereof and the boltheads of the first joint fastening member and the second joint fasteningmember function as external input and output terminals after the firstjoint fastening member and the second joint fastening member are fixedto the module case, the PCB, and the electrode terminals by bolting. 13.The battery pack according to claim 12, wherein the first jointfastening member and the second joint fastening member fix even a mountpart of a device, in which the battery pack is mounted, by bolting. 14.The battery pack according to claim 1, further comprising a labelattached to outer surfaces of the PCM and the battery cell excludingexternal input and output terminals in a wrapping fashion.
 15. Aprotection circuit module (PCM) loaded on a sealed surplus part of aplate-shaped battery cell having an electrode assembly, configured tohave a structure in which a separator is disposed between a cathode andan anode, received in a battery case together with an electrolyte in asealed state, wherein the PCM comprises a PCB, a safety elementelectrically connected between electrode terminals formed at one side ofthe battery cell and the PCB or loaded on the PCB, and an electricallyinsulative module case for surrounding the PCB and the safety element,the module case comprises an upper case and a lower case coupled to eachother through an assembly type fastening structure for receiving the PCBand the safety element, the module case, the PCB, and the electrodeterminals are provided with first openings and second openings having asufficient size to allow a first joint fastening member and a secondjoint fastening member to extend therethrough, and the PCB is loaded onthe sealed surplus part of the battery cell in a state in which the PCBis received between the upper case and the lower case such that the PCBis electrically connected to the electrode terminals of the battery cellin a state in which the PCB is coupled to the electrode terminals of thebattery cell by the first joint fastening member and the second jointfastening member.
 16. The PCM according to claim 15, wherein the firstjoint fastening member extends through the first openings, the secondjoint fastening member extends through the second openings, and thefirst openings and the second openings formed at the module case, thePCB, and the electrode terminals each are aligned in a straight linesuch that the first joint fastening member and the second jointfastening member extend through the first openings and the secondopenings formed at the module case, the PCB, and the electrodeterminals, respectively, in the straight line.
 17. The PCM according toclaim 15, wherein the first joint fastening member and the second jointfastening member each are made of an electrically conductive material.18. The PCM according to claim 17, wherein the first joint fasteningmember and the second joint fastening member each are configured to havea bolt structure comprising a bolt head and a bolt body having a threadformed at an outside thereof and the bolt heads of the first jointfastening member and the second joint fastening member function asexternal input and output terminals after the first joint fasteningmember and the second joint fastening member are fixed to the modulecase, the PCB, and the electrode terminals by bolting.
 19. The PCMaccording to claim 18, wherein the first joint fastening member and thesecond joint fastening member fix even a mount part of a device, inwhich a battery pack is mounted, by bolting.
 20. A method ofmanufacturing a battery pack according to claim 1, the methodcomprising: (a) mounting a PCB in a module case; (b) loading a PCM on asealed surplus part of a battery cell; (c) assembling and fastening afirst joint fastening member and a second joint fastening member intofirst openings and second openings, respectively; and (d) attaching alabel to outer surfaces of the PCM and the battery cell in a wrappingfashion.
 21. A mobile device comprising a battery pack according toclaim 1 as a power source.
 22. The mobile device according to claim 21,wherein the mobile device is a mobile phone, a laptop computer, anetbook computer, a tablet PC, or a smart pad.